Thermoplastic polycarbonate compositions, method of manufacture, and method of use thereof
A thermoplastic composition comprising in combination a polycarbonate component; a functionalized silane coupling agent; an impact modifier; and a filler is disclosed. The composition optionally comprises a polycarbonate-polysiloxane copolymer and/or a flame retardant. The compositions have a good balance of properties, and if desired, are also flame retardant.
1 . A thermoplastic composition, comprising:
a polycarbonate resin;
a functionalized silane coupling agent having the formula (X) 3-n (CH 3 ) n Si—R—Y, wherein R is monovalent hydrocarbon having from 1 to 8 carbon atoms; Y is a functional group selected from the group consisting of OCOC(R 1 )═CH 2 and CH═CH 2 , wherein R 1 is hydrogen or a monovalent hydrocarbon having from 1 to 8 carbon atoms; X is a hydrolytic group selected from the group consisting of CH 3 O—, C 2 H 5 O—, and CH 3 OC 2 H 4 O—; and n is 0 or 1; and
a filler.
2 . The composition of claim 1 , wherein the silane coupling agent is selected from the group consisting of vinyltriethoxysilane, vinylmethyldiethoxysilane, vinylmethyldimethoxysilane, vinyltris-(2-methoxyethoxy)silane, methacryloxypropyltrimethoxysilane, and methacryloxypropyltriethoxysilane.
3 . The composition of claim 1 , wherein the filler is selected from the group consisting of talc, clay, mica, wollastonite, silica, quartz, glass and combinations thereof.
4 . The composition of claim 1 , further comprising a polycarbonate-polysiloxane copolymer.
5 . The composition of claim 1 , wherein the composition further comprises a flame retardant, and the flame retardant comprises an organic phosphate.
6 . The composition of claim 5 , wherein the composition is capable of achieving a UL94 rating of V0 at a thickness of less than or equal to 1.2 mm.
7 . The composition of claim 6 , wherein the composition is capable of achieving a UL94 rating of V0 at a thickness of 0.8 mm.
8 . The composition of claim 1 , further comprising an impact modifier.
9 . The composition of claim 8 , wherein the impact modifier is selected from the group consisting of ABS, MBS, Bulk ABS, AES, ASA, MABS, and combinations thereof.
10 . The composition of claim 9 , wherein the impact modifier is Bulk ABS comprising an elastomeric phase comprising (i) butadiene and having a Tg of less than about 10° C., and (ii) a rigid polymeric phase comprising a copolymer of a monovinylaromatic monomer such as styrene and an unsaturated nitrile such as acrylonitrile.
11 . An article comprising the composition of claim 1 .
12 . A method for forming an article, comprising molding, extruding, shaping or forming the composition of claim 1 to form the article.
13 . A thermoplastic composition, comprising:
a polycarbonate resin;
a functionalized silane coupling agent having the formula (X) 3-n (CH 3 ) n Si—R—Y, wherein R is monovalent hydrocarbon having from 1 to 8 carbon atoms; Y is a functional group selected from the group consisting of OCOC(R 1 )═CH 2 and CH═CH 2 , wherein R 1 is hydrogen or a monovalent hydrocarbon having from 1 to 8 carbon atoms; X is a hydrolytic group selected from the group consisting of CH 3 O—, C 2 H 5 O—, and CH 3 OC 2 H 4 O—; and n is 0 or 1;
a filler; and
a flame retardant,
wherein the composition is capable of achieving a UL94 rating of V0 at a thickness of less than or equal to 1.2 mm.
14 . The composition of claim 13 , further comprising an impact modifier.
15 . The composition of claim 13 , wherein the silane coupling agent is selected from the group consisting of vinyltriethoxysilane, vinylmethyldiethoxysilane, vinylmethyldimethoxysilane, vinyltris-(2-methoxyethoxy)silane, methacryloxypropyltrimethoxysilane and methacryloxypropyltriethoxysilane.
16 . The composition of claim 13 , further comprising a polycarbonate-polysiloxane copolymer.
17 . A thermoplastic composition, comprising:
a polycarbonate resin;
an impact modifier;
a functionalized silane coupling agent having the formula (X) 3-n (CH 3 ) n Si—R—Y, wherein R is monovalent hydrocarbon having from 1 to 8 carbon atoms; Y is a functional group selected from the group consisting of OCOC(R 1 )═CH 2 and CH═CH 2 , wherein R 1 is hydrogen or a monovalent hydrocarbon having from 1 to 8 carbon atoms; X is a hydrolytic group selected from the group consisting of CH 3 O—, C 2 H 5 O—, and CH 3 OC 2 H 4 O—; and n is 0 or 1;
a filler; and
a polycarbonate-polysiloxane copolymer.
18 . The composition of claim 17 , wherein the composition further comprises a flame retardant, and the flame retardant comprises an organic phosphate.
19 . The composition of claim 18 , wherein the composition is capable of achieving a UL94 rating of V0 at a thickness of less than or equal to 1.2 mm.
20 . The composition of claim 17 , wherein the silane coupling agent is selected from the group consisting of vinyltriethoxysilane, vinylmethyldiethoxysilane, vinylmethyldimethoxysilane, vinyltris-(2-methoxyethoxy)silane, methacryloxypropyltrimethoxysilane and methacryloxypropyltriethoxysilane.
21 . An article comprising the composition of claim 17 .
22 . A thermoplastic composition, comprising:
a polycarbonate resin;
an impact modifier;
a functionalized silane coupling agent having the formula (X) 3-n (CH 3 ) n Si—R—Y, wherein R is monovalent hydrocarbon having from 1 to 8 carbon atoms; Y is a functional group selected from the group consisting of OCOC(R 1 )═CH 2 and CH═CH 2 , wherein R 1 is hydrogen or a monovalent hydrocarbon having from 1 to 8 carbon atoms; X is a hydrolytic group selected from the group consisting of CH 3 O—, C 2 H 5 O—, and CH 3 OC 2 H 4 O—; and n is 0 or 1;
a filler;
a polycarbonate-polysiloxane copolymer; and
a flame retardant.